Download Firehose Oppo A3s Cph1803 Repack Link
Click Load XML and select the rawprogram0.xml and patch0.xml from your firmware folder. Connect Device (EDL Mode): Turn off the phone. Press and hold Volume Up + Volume Down simultaneously. Connect the USB cable while holding the buttons.
For users dealing with a bricked or locked device, finding a reliable download for the Firehose Oppo A3s CPH1803 Repack file download firehose oppo a3s cph1803 repack
Additionally, a newer tool called (found at https://github.com/z4g7298d6b/OP_Flash_Tool ) provides a free offline Firehose workaround for many Oppo, Realme, and OnePlus devices. The repository contains batch files and Firehose loaders that bypass the server authentication. Click Load XML and select the rawprogram0